.container {
  width: 100%;
  height: 100%;
  overflow: hidden;
  position: relative;
  .myCanvas {
    border: 1px solid red;
    width: 100%;
    height: 100%;
  }
  .sider {
    position: absolute;
    width: 50px;
    left: 10px;
    top: 50%;
    z-index: 100;
    border: 1px solid red;
    .item {
      height: 50px;
      line-height: 50px;
      cursor: pointer;
      &:hover {
        background-color: #ccc;
      }
    }
  }
}
